John has 3 fewer dimes than quarters. He has twice as many nickels as quarters. Altogether he has $6.45, how many of each coin does he have?

Apackage of bacon holds 15 strips of bacon. the pancake house uses 17 packages of bacon in the morning and 21 packages in the afternoon. how many more strips were used in the afternoon than the morning?

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5